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JP2006148636A - Diaphragm and speaker using the same - Google Patents

Diaphragm and speaker using the same Download PDF

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Publication number
JP2006148636A
JP2006148636A JP2004337115A JP2004337115A JP2006148636A JP 2006148636 A JP2006148636 A JP 2006148636A JP 2004337115 A JP2004337115 A JP 2004337115A JP 2004337115 A JP2004337115 A JP 2004337115A JP 2006148636 A JP2006148636 A JP 2006148636A
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JP
Japan
Prior art keywords
diaphragm
outer peripheral
circular
shape
voice coil
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Granted
Application number
JP2004337115A
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Japanese (ja)
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JP4576991B2 (en
JP2006148636A5 (en
Inventor
Osamu Funahashi
修 舟橋
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Filing date
Publication date
Priority to JP2004337115A priority Critical patent/JP4576991B2/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to EP05806916.2A priority patent/EP1708542B1/en
Priority to CN2005800071311A priority patent/CN1930911B/en
Priority to KR1020067017565A priority patent/KR100839713B1/en
Priority to PCT/JP2005/021225 priority patent/WO2006054687A1/en
Priority to US10/585,848 priority patent/US7627133B2/en
Publication of JP2006148636A publication Critical patent/JP2006148636A/en
Publication of JP2006148636A5 publication Critical patent/JP2006148636A5/ja
Application granted granted Critical
Publication of JP4576991B2 publication Critical patent/JP4576991B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To flatten signal reproduction characteristics as much as possible by lowering a resonance level about a diaphragm and a speaker using the diaphragm. <P>SOLUTION: A diaphragm 9 has a through hole 10 for fixing a voice coil at the center and a fixing part of an edge 12 at an outer circumferential part, and its outer circumferential shape is nearly circular form. The outer circumferential shape of the diaphragm 9 is formed by overlapping first and second circular bodies 9A and 9B with different diameters with their respective center points 9a and 9b shifted from each other in such a manner that at least a portion of the outer circumferential shapes of the first and second circular bodies 9A and 9B may form a portion of the outer circumferential shape being almost circular in the entire shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は振動板とそれを用いたスピーカに関するものである。   The present invention relates to a diaphragm and a speaker using the diaphragm.

スピーカには、それぞれ固有の共振振動周波数が発生する。   Each speaker generates a unique resonant vibration frequency.

このため、その共振振動周波数だけは他の周波数に比べ、再生レベルが異常に高くなってしまい、適切な信号再生が出来ないという問題があった。   For this reason, only the resonant vibration frequency has a problem that the reproduction level becomes abnormally higher than other frequencies, and appropriate signal reproduction cannot be performed.

そこで、振動板の外周形状を、例えば楕円形にすることによって、固有振動周波数における共振レベルを抑えることが提案されている（例えば特許文献１）。
特開平７−１６２９９２号公報 Therefore, it has been proposed to suppress the resonance level at the natural vibration frequency by making the outer peripheral shape of the diaphragm, for example, elliptical (for example, Patent Document 1).
JP 7-162992 A

上記従来例のごとく、振動板の外周形状を、例えば楕円形にすることによって、固有振動周波数における共振レベルを抑えるものは、共振レベルを抑えることに対し、ある程度の効果は認められるものの、依然固有振動周波数における共振レベルの高さが問題になっている。   As in the above conventional example, by making the outer peripheral shape of the diaphragm into an elliptical shape, for example, suppressing the resonance level at the natural vibration frequency has some effect on suppressing the resonance level, but is still inherent. The high resonance level at the vibration frequency is a problem.

その理由は明解になってはいないが、恐らく楕円形状にしたものでは、振動板外周から中心点を無数引いた状態で、何れの中心線も、振動板の中心点からの左右の距離が一定となり、このことが共振レベルをそれ程下げられないことになっているものと思われる。   The reason for this is not clear, but in the case of an elliptical shape, the distance between the left and right of the center point of the diaphragm is constant for each center line with countless center points from the outer periphery of the diaphragm. This seems to mean that the resonance level cannot be lowered so much.

そこで本発明は、共振レベルを下げることにより、信号再生特性を出来るだけ平坦化することを目的とするものである。   Therefore, the present invention aims to flatten the signal reproduction characteristics as much as possible by lowering the resonance level.

そしてこの目的を達成するために本発明は、中央部にボイスコイル固定用の貫通孔、外周部にエッジ固定部を有する外周形状が略円形の一枚の振動板であって、この振動板の外周形状は、半径の異なる第一，第二の円形体を、それぞれの中心点をずらした状態で、しかもこれらの第一，第二の円形体の外周形状の少なくとも一部が全体形状の略円形の外周形状の一部を形成するごとく重ねた形状としたものである。   In order to achieve this object, the present invention is a diaphragm having a substantially circular outer peripheral shape having a voice coil fixing through-hole in the central portion and an edge fixing portion in the outer peripheral portion. The outer peripheral shape is a state in which the first and second circular bodies having different radii are shifted from the center point, and at least a part of the outer peripheral shape of the first and second circular bodies is substantially the entire shape. It is made into the shape piled up so that a part of circular outer periphery shape might be formed.

つまり本発明においては、外周形状のほとんどの部分から引いた中心線が、その中心点の左右からの距離が異なることとなり、このことが共振レベルを大幅に引き下げることになり、この結果として信号再生特性を出来るだけ平坦化することができるようになる。   In other words, in the present invention, the center line drawn from most of the outer peripheral shape has a different distance from the left and right of the center point, which greatly reduces the resonance level, resulting in signal reproduction. The characteristics can be flattened as much as possible.

以上のように本発明は、中央部にボイスコイル固定用の貫通孔、外周部にエッジ固定部を有する外周形状が略円形の一枚の振動板であって、この振動板の外周形状は、半径の異なる第一，第二の円形体を、それぞれの中心点をずらした状態で、しかもこれらの第一，第二の円形体の外周形状の少なくとも一部が全体形状の略円形の外周形状の一部を形成するごとく重ねた形状としたものであるので、外周形状のほとんどの部分から引いた中心線が、その中心点の左右からの距離が異なることとなり、このことが共振レベルを大幅に引き下げることになり、この結果として信号再生特性を出来るだけ平坦化することができるようになる。   As described above, the present invention is a diaphragm having a substantially circular outer periphery having a voice coil fixing through-hole at the center and an edge fixing portion at the outer periphery, and the outer periphery of the diaphragm is The first and second circular bodies having different radii are in a state in which the respective center points are shifted, and at least a part of the outer peripheral shape of these first and second circular bodies is a substantially circular outer peripheral shape. Since the center line drawn from most parts of the outer peripheral shape has a different distance from the left and right of the center point, this greatly increases the resonance level. As a result, the signal reproduction characteristic can be flattened as much as possible.

以下本発明の一実施形態を添付図面を用いて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

図１において、１は皿状のフレームで、その内部底面には、磁気回路２が収納されている。磁気回路２は磁石３と、ヨーク４と、プレート５とからなり、ヨーク４とプレート５の先端間で磁気ギャップ６が形成されている。   In FIG. 1, reference numeral 1 denotes a dish-like frame, and a magnetic circuit 2 is accommodated on the inner bottom surface thereof. The magnetic circuit 2 includes a magnet 3, a yoke 4, and a plate 5, and a magnetic gap 6 is formed between the yoke 4 and the tip of the plate 5.

この磁気ギャップ６内には円筒状のボイスコイル７の下端部分のコイル８部分が、可動自在に収納されている。また、このボイスコイル７の上端は振動板９の中央の貫通孔１０を貫通し、この貫通部分で接着剤により固定されている。さらにボイスコイル７の上端にはキャップ１１が被せられている。   In the magnetic gap 6, a coil 8 portion at the lower end portion of the cylindrical voice coil 7 is movably accommodated. Further, the upper end of the voice coil 7 passes through the central through hole 10 of the diaphragm 9 and is fixed by an adhesive at this through portion. Further, a cap 11 is put on the upper end of the voice coil 7.

振動板９は図１、図２に示すように、中央部にボイスコイル７固定用の貫通孔１０、外周部にエッジ１２の固定部を有する外周形状が略円形の一枚の振動板であって、この振動板９の外周形状は、半径の異なる第一，第二の円形体９Ａ，９Ｂを、それぞれの中心点９ａ，９ｂをずらした状態で、しかもこれらの第一，第二の円形体９Ａ，９Ｂの外周形状の少なくとも一部が全体形状の略円形の外周形状の一部を形成するごとく重ねた形状としている。   As shown in FIGS. 1 and 2, the diaphragm 9 is a diaphragm having a substantially circular outer peripheral shape having a through hole 10 for fixing the voice coil 7 at the center and a fixing portion for the edge 12 at the outer peripheral portion. The outer peripheral shape of the diaphragm 9 is such that the first and second circular bodies 9A and 9B having different radii are shifted from the center points 9a and 9b, and the first and second circles are arranged. At least a part of the outer peripheral shape of the shapes 9A and 9B is overlapped so as to form a part of the substantially circular outer peripheral shape of the overall shape.

この点をさらに説明すると、振動板９の外周でＡ点から時計回りにＢ点まで小形の円形体９Ｂの外周が表れており、Ｂ点から時計回りにＢ点まで大形の円形体９Ａの外周が表れている。このため、振動板９はその中心点９ｃからの外周形状のほとんどの部分から引いた中心線が、その中心点９ｃの左右からの距離が異なることとなる（中心線Ｋ部分だけは中心点９ｃの左右の距離が同じ）。このことが共振レベルを大幅に引き下げることになり、この結果として信号再生特性を図３のＡ線のごとく、従来のＢ線に比べて平坦化することができた。   This point will be further described. The outer periphery of the small circular body 9B appears from the point A clockwise to the point B on the outer periphery of the diaphragm 9, and the large circular body 9A extends from the point B clockwise to the point B. The outer periphery appears. Therefore, the diaphragm 9 has a center line drawn from most of the outer peripheral shape from the center point 9c, and the distance from the left and right of the center point 9c is different (the center line K is only the center point 9c). Is the same distance on the left and right). This greatly reduces the resonance level. As a result, the signal reproduction characteristics can be flattened as compared with the conventional B line as shown by the A line in FIG.

なお、図１に示すエッジ１２は上方に突出した半円形のクッション部分１２ａが図２のごとく円形となっている。またこのクッション部分１２ａの外周には、円形で、フレーム１に固定するためのフランジ１２ｂが、さらにクッション部分１２ａの内周には、円形で、振動板９に固定するためのフランジ１２ｃがそれぞれ設けられている。   The edge 12 shown in FIG. 1 has a semicircular cushion portion 12a protruding upward as shown in FIG. Further, a circular flange 12b for fixing to the frame 1 is provided on the outer periphery of the cushion portion 12a, and a circular flange 12c for fixing to the diaphragm 9 is provided on the inner periphery of the cushion portion 12a. It has been.

なお、振動板９の下面には、リング状のダンパー１３の内端側が固定され、このダンパー１３の外周端はエッジ１４を介してフレーム１に固定されている。   The inner end side of the ring-shaped damper 13 is fixed to the lower surface of the diaphragm 9, and the outer peripheral end of the damper 13 is fixed to the frame 1 through the edge 14.

本発明の振動板は、信号再生特性を従来に比べて平坦化することができるので、これをスピーカに採用すれば、適切な信号再生が出来る。   Since the diaphragm of the present invention can flatten the signal reproduction characteristics as compared with the conventional one, if this is adopted for a speaker, appropriate signal reproduction can be performed.

本発明のスピーカの一実施の形態を示す断面図Sectional drawing which shows one Embodiment of the speaker of this invention その振動板部分の平面図Plan view of the diaphragm その信号再生特性図Its signal reproduction characteristics

符号の説明Explanation of symbols

２ 磁気回路
６ 磁気ギャップ
７ ボイスコイル
９ 振動板
１０ 貫通孔
９Ａ、９Ｂ 第一，第二の円形体
９ａ，９ｂ 中心点 2 Magnetic circuit 6 Magnetic gap 7 Voice coil 9 Diaphragm 10 Through-hole 9A, 9B First and second circular bodies 9a, 9b Center point

Claims (4)

中央部にボイスコイル固定用の貫通孔、外周部にエッジ固定部を有する外周形状が略円形の一枚の振動板であって、この振動板の外周形状は、半径の異なる第一，第二の円形体を、それぞれの中心点をずらした状態で、しかもこれらの第一，第二の円形体の外周形状の少なくとも一部が全体形状の略円形の外周形状の一部を形成するごとく重ねた形状とした振動板。 The outer peripheral shape having a through hole for fixing a voice coil in the central portion and an edge fixing portion in the outer peripheral portion is a substantially circular diaphragm, and the outer peripheral shape of the diaphragm has first and second different radii. The circular bodies of the first and second circular bodies are overlapped with their center points shifted so that at least a part of the outer peripheral shape of the first and second circular bodies forms a part of a substantially circular outer peripheral shape. Diaphragm with a different shape. 第一，第二の円形体の中心点は、全体形状の中心点とはずらせた請求項１に記載の振動板。 The diaphragm according to claim 1, wherein the center point of the first and second circular bodies is deviated from the center point of the overall shape. 磁気ギャップを有する磁気回路と、この磁気回路の磁気ギャップ内にその一部が挿入された円筒状のボイスコイルと、このボイスコイルの一部に固定された一枚の振動板とを備え、前記振動板は、中央部にボイスコイル固定用の貫通孔、外周部にエッジ固定部を有する外周形状が略円形の振動板であって、この振動板の外周形状は、半径の異なる第一，第二の円形体を、それぞれの中心点をずらした状態で、しかもこれらの第一，第二の円形体の外周形状の少なくとも一部が全体形状の略円形の外周形状の一部を形成するごとく重ねた形状とし、その貫通孔内に、前記ボイスコイルの一部を挿入し、固定したスピーカ。 A magnetic circuit having a magnetic gap, a cylindrical voice coil partially inserted into the magnetic gap of the magnetic circuit, and one diaphragm fixed to a part of the voice coil, The diaphragm is a diaphragm having a substantially circular outer periphery having a voice coil fixing through-hole in the center and an edge fixing part in the outer periphery. The outer periphery of the diaphragm has first and second radii with different radii. The second circular body is in a state where the respective center points are shifted, and at least a part of the outer peripheral shape of the first and second circular bodies forms a part of the substantially circular outer peripheral shape of the overall shape. A loudspeaker in which the voice coil is partially inserted and fixed in the through hole. 振動板の第一，第二の円形体の中心点は、振動板の全体形状の中心点とはずらせた請求項３に記載の振動板。 The diaphragm according to claim 3, wherein the center point of the first and second circular bodies of the diaphragm is deviated from the center point of the overall shape of the diaphragm.
JP2004337115A 2004-11-22 2004-11-22 Diaphragm and speaker using it Expired - Fee Related JP4576991B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2004337115A JP4576991B2 (en) 2004-11-22 2004-11-22 Diaphragm and speaker using it
CN2005800071311A CN1930911B (en) 2004-11-22 2005-11-18 Diaphragm and loudspeaker using same
KR1020067017565A KR100839713B1 (en) 2004-11-22 2005-11-18 Diaphragm and loudspeaker using same
PCT/JP2005/021225 WO2006054687A1 (en) 2004-11-22 2005-11-18 Diaphragm and loudspeaker using same
EP05806916.2A EP1708542B1 (en) 2004-11-22 2005-11-18 Diaphragm and loudspeaker using same
US10/585,848 US7627133B2 (en) 2004-11-22 2005-11-18 Diaphragm and loudspeaker using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004337115A JP4576991B2 (en) 2004-11-22 2004-11-22 Diaphragm and speaker using it

Publications (3)

Publication Number Publication Date
JP2006148636A true JP2006148636A (en) 2006-06-08
JP2006148636A5 JP2006148636A5 (en) 2007-12-20
JP4576991B2 JP4576991B2 (en) 2010-11-10

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JP2004337115A Expired - Fee Related JP4576991B2 (en) 2004-11-22 2004-11-22 Diaphragm and speaker using it

Country Status (6)

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US (1) US7627133B2 (en)
EP (1) EP1708542B1 (en)
JP (1) JP4576991B2 (en)
KR (1) KR100839713B1 (en)
CN (1) CN1930911B (en)
WO (1) WO2006054687A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018098621A (en) * 2016-12-13 2018-06-21 パナソニックＩｐマネジメント株式会社 Diaphragm for loudspeaker and loudspeaker using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4867774B2 (en) * 2007-04-26 2012-02-01 パナソニック株式会社 Speaker
EP2560409B8 (en) * 2010-04-14 2015-10-07 Panasonic Intellectual Property Management Co., Ltd. Speaker, hearing aid, inner ear headphone, mobile information processing device, and av device
US9485586B2 (en) 2013-03-15 2016-11-01 Jeffery K Permanian Speaker driver

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS452459Y1 (en) * 1967-12-30 1970-01-31
US3570626A (en) * 1966-05-03 1971-03-16 Nippon Musical Instruments Mfg Loudspeaker with asymmetrically shaped diaphragm
JPS63236499A (en) * 1987-03-11 1988-10-03 ブラウプンクト‐ヴエルケ・ゲゼルシャフト・ミット・ベシユレンクテル・ハフツング Loudspeaker
JPH07336795A (en) * 1994-06-06 1995-12-22 Kenwood Corp Structure of speaker
JPH09284886A (en) * 1996-04-18 1997-10-31 Onkyo Corp Speaker

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS3618103Y1 (en) * 1957-11-16 1961-07-13
US3180945A (en) * 1961-09-22 1965-04-27 Wm H Welsh Co Inc Loudspeaker
JPS4741471Y1 (en) * 1968-12-05 1972-12-15
JPS5010231U (en) * 1973-05-24 1975-02-01
JPS5137056B2 (en) 1973-05-31 1976-10-13
JPS61121687A (en) * 1984-11-19 1986-06-09 Matsushita Electric Ind Co Ltd Speaker
SE447692B (en) * 1985-04-17 1986-12-01 Claes Malmqvist DEVICE BY SPEAKERS
JPH07162992A (en) * 1993-12-06 1995-06-23 Sharp Corp Speaker diaphragm
JP3599954B2 (en) * 1996-12-11 2004-12-08 有限会社ベルテック Speaker
JP3508834B2 (en) * 1999-04-22 2004-03-22 株式会社ケンウッド Speaker diaphragm
DE60233105D1 (en) * 2001-06-11 2009-09-10 Panasonic Corp SPEAKER
JP3799001B2 (en) 2001-09-10 2006-07-19 富士彦 小林 Piezoelectric speaker
US7027688B2 (en) 2002-05-14 2006-04-11 Wildnauer Kenneth R Tunable optical filter based on a physically-deformable diffractive element
JP3951838B2 (en) * 2002-07-12 2007-08-01 松下電器産業株式会社 Speaker
JP4034688B2 (en) * 2002-08-28 2008-01-16 富士彦 小林 Piezoelectric speaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570626A (en) * 1966-05-03 1971-03-16 Nippon Musical Instruments Mfg Loudspeaker with asymmetrically shaped diaphragm
JPS452459Y1 (en) * 1967-12-30 1970-01-31
JPS63236499A (en) * 1987-03-11 1988-10-03 ブラウプンクト‐ヴエルケ・ゲゼルシャフト・ミット・ベシユレンクテル・ハフツング Loudspeaker
JPH07336795A (en) * 1994-06-06 1995-12-22 Kenwood Corp Structure of speaker
JPH09284886A (en) * 1996-04-18 1997-10-31 Onkyo Corp Speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018098621A (en) * 2016-12-13 2018-06-21 パナソニックＩｐマネジメント株式会社 Diaphragm for loudspeaker and loudspeaker using the same

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WO2006054687A1 (en) 2006-05-26
JP4576991B2 (en) 2010-11-10
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EP1708542A4 (en) 2011-03-23
US7627133B2 (en) 2009-12-01
KR100839713B1 (en) 2008-06-19
EP1708542A1 (en) 2006-10-04
CN1930911A (en) 2007-03-14
EP1708542B1 (en) 2013-08-07
CN1930911B (en) 2011-08-03

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